EP1111905A2 - Procédé et appareil de formation de points demi-teintes - Google Patents
Procédé et appareil de formation de points demi-teintes Download PDFInfo
- Publication number
- EP1111905A2 EP1111905A2 EP00127152A EP00127152A EP1111905A2 EP 1111905 A2 EP1111905 A2 EP 1111905A2 EP 00127152 A EP00127152 A EP 00127152A EP 00127152 A EP00127152 A EP 00127152A EP 1111905 A2 EP1111905 A2 EP 1111905A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- halftone
- halftone dot
- dots
- halftone dots
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
Definitions
- the present invention relates to a technology for forming halftone dots used in printing.
- an original multi-tone image is converted into halftone images for primary ink colors, and these halftone images are then used to produce a print image.
- Halftone dots are generally used in the halftoning process for converting the original image into halftone images.
- AM halftone dots Conventional halftone dots (so-called AM halftone dots) are regularly arranged at certain intervals in a matrix fashion.
- the image density is expressed in terms of the total area of the halftone dots per unit area.
- the regular arrangement of AM halftone dots is fixed at all times, and the number of black pixels that constitute one halftone dot increases as the level of the multi-tone image signal increases.
- 'pixel' refers to one unit of recording in an image recorder. For example, in an image recorder that exposes photosensitive film or a printing plate using laser beams, one light spot of a laser beam corresponds to one pixel.
- FM screening a halftone method called FM screening.
- the image density is increased not by increasing the halftone dot size but by increasing the number of small dots, which are called FM dots.
- FM screening the above-mentioned various problems occurring in connection with AM halftone dots are reduced.
- FM screening also has the following problems:
- An object of the present invention is to provide halftone dots having printing performance that is more desirable, in at least some terms, than the conventional halftone dots, as well as to provide a printing technology using these halftone dots.
- each halftone dot is randomly placed, and a halftone dot area rate at which half of the halftone dots join with their adjacent halftone dots in an image area having a uniform image density is set to a value larger than 50%.
- a halftone dot area rate at which half of the halftone dots join with their adjacent halftone dots in an image area having a uniform image density is set to a value larger than 50%.
- halftone dot cells each of which includes one halftone dot have various irregular shapes. Smooth images will be reproduced with these halftone dots.
- the present invention may be implemented in various forms such as: halftone dots, a halftone dot forming method and apparatus, a printing method and apparatus, a computer program to implement these methods and apparatus functions, a computer program product of the computer program, and data signals embodied in a carrier wave including the computer program.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36639599A JP3427026B2 (ja) | 1999-12-24 | 1999-12-24 | 網点形成方法および装置 |
JP36639599 | 1999-12-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1111905A2 true EP1111905A2 (fr) | 2001-06-27 |
EP1111905A3 EP1111905A3 (fr) | 2004-08-11 |
EP1111905B1 EP1111905B1 (fr) | 2009-07-29 |
Family
ID=18486683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00127152A Expired - Lifetime EP1111905B1 (fr) | 1999-12-24 | 2000-12-12 | Procédé et appareil de formation de points demi-teintes |
Country Status (4)
Country | Link |
---|---|
US (1) | US6989913B2 (fr) |
EP (1) | EP1111905B1 (fr) |
JP (1) | JP3427026B2 (fr) |
DE (1) | DE60042635D1 (fr) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1528789A2 (fr) * | 2003-10-29 | 2005-05-04 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer des points de demi-teintes, appareil de formation de points de demi-teintes, méthode de géneration de la matrice de seuil nécessaire et support d'enregistrement des points de demi-teintes |
WO2005109850A1 (fr) * | 2004-05-05 | 2005-11-17 | Eastman Kodak Company | Gestion des couleurs d'impressions en demi-tons |
FR2873883A1 (fr) * | 2004-07-28 | 2006-02-03 | Sagem | Procede de tramage d'une image |
EP1679880A2 (fr) * | 2005-01-07 | 2006-07-12 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer une matrice de seuil, appareil pour générer une matrice de seuil, et support d'enregistrement |
EP1601182A3 (fr) * | 2004-05-28 | 2007-03-28 | Dainippon Screen Mfg. Co., Ltd. | Procédé et appareil pour la création d'images en demi-teintes, utilisant une matrice de seuillage pour chaque composante de couleur |
DE102005055446B3 (de) * | 2005-11-21 | 2007-06-21 | Dai Nippon Printing Co., Ltd. | Verfahren und Vorrichtung zum Erzeugen eines Schirmbilds |
EP1646222A3 (fr) * | 2004-10-08 | 2008-11-05 | Dainippon Screen Mfg., Co., Ltd. | Procédé pour générer une matrice de seuil pour la génération d'une image à demi-teintes et support d'enregistrement stockant les données d'une matrice de seuil |
EP2476245A2 (fr) * | 2009-09-11 | 2012-07-18 | Andrew William Peter Cave | Programme informatique de generation de donnees d'image a 1 bit a partir de donnees d'image a bits multiples |
WO2015110988A1 (fr) * | 2014-01-22 | 2015-07-30 | Landa Corporation Ltd. | Appareil et procédé de tramage |
US10410100B1 (en) | 2017-11-14 | 2019-09-10 | Landa Corporation Ltd. | AM Screening |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
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US7224488B2 (en) * | 2001-06-12 | 2007-05-29 | Fujifilm Corporation | Method of correcting threshold array, dot pattern data structure, method of correcting pixel layout of image, and method of determining threshold array for generating image |
TW200409637A (en) * | 2002-06-26 | 2004-06-16 | Glaxo Group Ltd | Compounds |
US20040021911A1 (en) * | 2002-07-31 | 2004-02-05 | Corson John F. | Array scanner noise reduction system |
EP1475666A1 (fr) * | 2003-05-06 | 2004-11-10 | ASML Netherlands B.V. | Dispositif de maintien de substrat pour appareil lithographique |
JP4501515B2 (ja) * | 2003-06-16 | 2010-07-14 | 株式会社デンソー | 車両用表示装置およびその表示板 |
US7198345B2 (en) | 2003-11-19 | 2007-04-03 | Canon Kabushiki Kaisha | Ink jet printing method and ink jet printing system |
WO2005109851A1 (fr) * | 2004-05-06 | 2005-11-17 | Seiko Epson Corporation | Dispositif de traitement d’image, procede de traitement d’image, et programme |
JP2005341089A (ja) * | 2004-05-26 | 2005-12-08 | Dainippon Printing Co Ltd | スクリーン画像の生成方法 |
JP4591951B2 (ja) * | 2004-09-01 | 2010-12-01 | 大日本印刷株式会社 | スクリーン画像の生成方法 |
JP4260714B2 (ja) * | 2004-09-16 | 2009-04-30 | 大日本印刷株式会社 | 網点からなる画像の印刷方法ならびに画像変換方法および装置 |
US20060197992A1 (en) * | 2005-03-02 | 2006-09-07 | Xerox Corporation | Stochastic screens for rendering devices with high-addressability |
JP4412248B2 (ja) * | 2005-07-05 | 2010-02-10 | セイコーエプソン株式会社 | 画像処理装置、画像処理方法、及び画像処理プログラム |
JP5194356B2 (ja) * | 2005-12-01 | 2013-05-08 | 大日本印刷株式会社 | グラビア印刷方法および印刷物 |
EP1912423A1 (fr) * | 2006-10-11 | 2008-04-16 | Hewlett-Packard Development Company, L.P. | Diffusion d'erreurs basé sur la séparation de couleurs et les méthodes de demi-teintes selon Küppers |
JP4929122B2 (ja) * | 2007-10-16 | 2012-05-09 | キヤノン株式会社 | 画像処理装置およびその方法、並びに、プログラム |
JP4975663B2 (ja) * | 2008-03-12 | 2012-07-11 | 大日本スクリーン製造株式会社 | 閾値マトリクス生成方法、網点画像生成方法および網点画像生成装置 |
JP2010078725A (ja) * | 2008-09-24 | 2010-04-08 | Fuji Xerox Co Ltd | 画像処理装置、画像形成装置及びプログラム |
US8564840B2 (en) | 2010-05-28 | 2013-10-22 | Xerox Corporation | Halftone tiling and halftoning for annular rasters |
US8681382B1 (en) * | 2010-11-09 | 2014-03-25 | Marvell International Ltd. | Threshold matrix diffusion halftoning |
JP5702621B2 (ja) * | 2011-02-10 | 2015-04-15 | 株式会社Screenホールディングス | 画像記録装置および画像記録方法 |
US8576449B2 (en) * | 2011-04-28 | 2013-11-05 | Xerox Corporation | Parametrically controlled halftone spot function for an irregular halftone grid |
US8467099B2 (en) * | 2011-05-16 | 2013-06-18 | Xerox Corporation | Directional halftone method with enhanced edge and detail rendition |
JP5891865B2 (ja) | 2012-03-14 | 2016-03-23 | 富士ゼロックス株式会社 | 画像処理用マスク生成方法、画像処理用マスク生成プログラム、画像処理装置及び画像処理プログラム |
JP5940506B2 (ja) * | 2013-10-30 | 2016-06-29 | 京セラドキュメントソリューションズ株式会社 | 網点追加装置、網点追加プログラムおよび網点追加方法 |
JP6380763B2 (ja) * | 2015-09-25 | 2018-08-29 | 京セラドキュメントソリューションズ株式会社 | 画像形成装置、色変換プログラムおよび色変換方法 |
JP6344353B2 (ja) * | 2015-09-25 | 2018-06-20 | 京セラドキュメントソリューションズ株式会社 | 画像形成装置、色変換プログラムおよび色変換方法 |
US11142013B2 (en) | 2016-05-27 | 2021-10-12 | Esko Software Bvba | Method for smoother tonal response in flexographic printing |
WO2020245290A1 (fr) * | 2019-06-05 | 2020-12-10 | Agfa Nv | Procédé de création de demi-teintes numériques |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0647058A2 (fr) * | 1993-09-28 | 1995-04-05 | Hewlett-Packard Company | Reproduction numérique en demi-teintes d'une image à tonalités de gris avec corrélation diagonale dépendante de la fréquence |
EP0721278A2 (fr) * | 1994-12-27 | 1996-07-10 | Dainippon Screen Mfg. Co., Ltd. | Procédé pour la production d'une matrice de seuil et méthode et appareil pour la génération d'images en demi-teintes |
EP0843462A2 (fr) * | 1996-11-14 | 1998-05-20 | Xerox Corporation | Processus de conception de points groupés de demi-teinte |
US5859955A (en) * | 1997-01-21 | 1999-01-12 | Xerox Corporation | Stochastically clustered dot halftoning system |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61154364A (ja) | 1984-12-27 | 1986-07-14 | Canon Inc | 画像処理方法 |
US6163382A (en) * | 1989-07-20 | 2000-12-19 | Netz; Yoel | Devices and methods for offset and similar printing systems |
JPH0722348B2 (ja) * | 1989-09-14 | 1995-03-08 | 大日本スクリーン製造株式会社 | 網目版画像記録方法 |
US5642436A (en) * | 1990-07-18 | 1997-06-24 | Linotype-Hell Ag | Method for generating and storing digitalized density threshold values for the rastering of a half-tone picture original |
US5264926A (en) * | 1990-09-14 | 1993-11-23 | Minnesota Mining And Manufacturing Company | Perpendicular, equal frequency non-conventional screen patterns for electronic halftone generation |
US6072592A (en) * | 1991-08-13 | 2000-06-06 | Megadot Systems Limited | Method and apparatus for preparing color screens in a halftone image |
WO1995006911A1 (fr) * | 1993-09-01 | 1995-03-09 | Canon Information Systems Research Australia Pty. Ltd. | Procede de creation de matrice de juxtaposition de points de couleur |
DE69425244T2 (de) * | 1994-04-27 | 2001-01-25 | Agfa Gevaert Nv | Tonabhängige Rosettenstrukturen bei der Mehrschichthalbtonrasterung durch Phasenmodulation |
WO1996004748A1 (fr) | 1994-07-29 | 1996-02-15 | The Harlequin Group Limited | Affichage d'image par agregats d'intensite uniformement repartis |
US5579457A (en) | 1994-07-29 | 1996-11-26 | The Harlequin Group Ltd. | Image display apparatus and method using irregularly placed curving structures |
US5689623A (en) | 1995-03-27 | 1997-11-18 | Optronics International Corporation | Spread spectrum digital screening |
US5745250A (en) * | 1997-03-07 | 1998-04-28 | Xerox Corporation | Method of producing tint dots with pairs of holladay halftones |
JPH1117821A (ja) | 1997-06-19 | 1999-01-22 | Tokyo Gas Co Ltd | 自動検針システム |
US6088512A (en) * | 1997-07-09 | 2000-07-11 | Seiko Epson Corporation | Void-and-cluster dither-matrix generation for better half-tone uniformity |
US6064359A (en) * | 1997-07-09 | 2000-05-16 | Seiko Epson Corporation | Frame rate modulation for liquid crystal display (LCD) |
US6356360B1 (en) * | 1997-12-16 | 2002-03-12 | Eastman Kodak Company | Apparatus and method for rendering halftone dot structures using grey level dots |
JP3905650B2 (ja) * | 1998-08-31 | 2007-04-18 | 武藤工業株式会社 | 疑似階調表現方法 |
-
1999
- 1999-12-24 JP JP36639599A patent/JP3427026B2/ja not_active Expired - Lifetime
-
2000
- 2000-12-12 DE DE60042635T patent/DE60042635D1/de not_active Expired - Lifetime
- 2000-12-12 EP EP00127152A patent/EP1111905B1/fr not_active Expired - Lifetime
- 2000-12-22 US US09/741,798 patent/US6989913B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0647058A2 (fr) * | 1993-09-28 | 1995-04-05 | Hewlett-Packard Company | Reproduction numérique en demi-teintes d'une image à tonalités de gris avec corrélation diagonale dépendante de la fréquence |
EP0721278A2 (fr) * | 1994-12-27 | 1996-07-10 | Dainippon Screen Mfg. Co., Ltd. | Procédé pour la production d'une matrice de seuil et méthode et appareil pour la génération d'images en demi-teintes |
EP0843462A2 (fr) * | 1996-11-14 | 1998-05-20 | Xerox Corporation | Processus de conception de points groupés de demi-teinte |
US5859955A (en) * | 1997-01-21 | 1999-01-12 | Xerox Corporation | Stochastically clustered dot halftoning system |
Non-Patent Citations (2)
Title |
---|
ANCIN H ET AL: "NEW VOID-AND-CLUSTER METHOD FOR IMPROVED HALFTONE UNIFORMITY" JOURNAL OF ELECTRONIC IMAGING, SPIE + IS&T, US, vol. 8, no. 1, January 1999 (1999-01), pages 104-111, XP000801644 ISSN: 1017-9909 * |
OSTROMOUKHOV V ET AL: "STOCHASTIC CLUSTERED-DOT DITHERING" JOURNAL OF ELECTRONIC IMAGING, SPIE + IS&T, US, vol. 8, no. 4, October 1999 (1999-10), pages 439-445, XP000875036 ISSN: 1017-9909 * |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1528789A2 (fr) * | 2003-10-29 | 2005-05-04 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer des points de demi-teintes, appareil de formation de points de demi-teintes, méthode de géneration de la matrice de seuil nécessaire et support d'enregistrement des points de demi-teintes |
EP1528789A3 (fr) * | 2003-10-29 | 2009-12-09 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer des points de demi-teintes, appareil de formation de points de demi-teintes, méthode de géneration de la matrice de seuil nécessaire et support d'enregistrement des points de demi-teintes |
WO2005109850A1 (fr) * | 2004-05-05 | 2005-11-17 | Eastman Kodak Company | Gestion des couleurs d'impressions en demi-tons |
EP1601182A3 (fr) * | 2004-05-28 | 2007-03-28 | Dainippon Screen Mfg. Co., Ltd. | Procédé et appareil pour la création d'images en demi-teintes, utilisant une matrice de seuillage pour chaque composante de couleur |
US7782493B2 (en) | 2004-05-28 | 2010-08-24 | Dainippon Screen Mfg. Co., Ltd. | Method of generating threshold matrix for creating halftone dot image and method and apparatus for creating halftone dot image and recording medium |
FR2873883A1 (fr) * | 2004-07-28 | 2006-02-03 | Sagem | Procede de tramage d'une image |
WO2006018554A1 (fr) * | 2004-07-28 | 2006-02-23 | Sagem Communication | Procédé de tramage d'une d'image |
US7911651B2 (en) | 2004-07-28 | 2011-03-22 | Sagem Communication | Method for screening an image |
US7471421B2 (en) | 2004-10-08 | 2008-12-30 | Dainippon Screen Mfg. Co., Ltd. | Method of generating threshold matrix and recording medium storing data of threshold matrix |
EP1646222A3 (fr) * | 2004-10-08 | 2008-11-05 | Dainippon Screen Mfg., Co., Ltd. | Procédé pour générer une matrice de seuil pour la génération d'une image à demi-teintes et support d'enregistrement stockant les données d'une matrice de seuil |
EP1679880A3 (fr) * | 2005-01-07 | 2009-06-24 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer une matrice de seuil, appareil pour générer une matrice de seuil, et support d'enregistrement |
EP1679880A2 (fr) * | 2005-01-07 | 2006-07-12 | Dainippon Screen Mfg. Co., Ltd. | Méthode pour générer une matrice de seuil, appareil pour générer une matrice de seuil, et support d'enregistrement |
DE102005055446B3 (de) * | 2005-11-21 | 2007-06-21 | Dai Nippon Printing Co., Ltd. | Verfahren und Vorrichtung zum Erzeugen eines Schirmbilds |
EP2476245A2 (fr) * | 2009-09-11 | 2012-07-18 | Andrew William Peter Cave | Programme informatique de generation de donnees d'image a 1 bit a partir de donnees d'image a bits multiples |
WO2015110988A1 (fr) * | 2014-01-22 | 2015-07-30 | Landa Corporation Ltd. | Appareil et procédé de tramage |
CN105917636A (zh) * | 2014-01-22 | 2016-08-31 | 兰达公司 | 半色调设备和方法 |
US9749497B2 (en) | 2014-01-22 | 2017-08-29 | Landa Corporation Ltd. | Apparatus and method using a mask producing a halftone image with centroids of clusters distributed stochastically and bridged-cluster combinations depending on threshold lightness levels |
CN105917636B (zh) * | 2014-01-22 | 2019-04-02 | 兰达公司 | 半色调设备和方法 |
US10410100B1 (en) | 2017-11-14 | 2019-09-10 | Landa Corporation Ltd. | AM Screening |
Also Published As
Publication number | Publication date |
---|---|
US20020051147A1 (en) | 2002-05-02 |
EP1111905B1 (fr) | 2009-07-29 |
DE60042635D1 (de) | 2009-09-10 |
EP1111905A3 (fr) | 2004-08-11 |
JP2001186346A (ja) | 2001-07-06 |
JP3427026B2 (ja) | 2003-07-14 |
US6989913B2 (en) | 2006-01-24 |
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